Problem with LVM at startup

[foux]

Hello, I badly removed my old LVM disk, an now I've got the following error on boot :

[Windfall]

Hello.

I guess you used pvremove with force or some such thing? I've done this once myself. If I recall correctly, I fixed it by recreating the pv with the correct uuid (pvcreate --uuid the_uuid_from_the_error_message /dev/your_disk) and then running vgcfgrestore (the `restore point' was created by lvm before carrying out the pvremove).
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Michal Marczyk

[foux]

Unfortunately I can't do that, because the disk knows has a different partitionning,

Regards,

FX

[hybrid]

hmmm, i think this comes from your partitionning, if i understood you well, you changed your partitions in the disk with the lvm_vg group, i think that you forgot to mark the new partition as being lvm ...

as a workaround you can simply use the /etc/lvm/lvm.conf (i think) to disable the scanning of the old HD, this is not a solution, but a workaround

[Windfall]

Well, I wonder if it would work if you just created another pv with the old pv's uuid and use it to fool lvm about the state of your vg. I've been looking at lvm's vg backups and they do contain the information about the device the pv's using, but there's always a comment on such lines saying it's only a hint. So, maybe this could help a bit. (Seems rather likely that some lvs will still be screwed, but maybe you can simply lvremove them then; no idea, never tried.)

Anyway, why don't you describe what you did in a little more detail? I mean, what was your original partitioning scheme, what is your current partitioning scheme and what exactly did you do to change it from the old one to the new one.
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Michal Marczyk

[foux]

Thanks for your answers, but they are not applicable

Here is exactly what I've done. I have two sata drives and one IDE.

I used to have my /home on a lvm on the two sata and my / on the IDE.

To speed up my system, I've decided to put my / on the sata, so, I delete the lvm, repartition my first sata (I've done nothing on the second).

Then, I have recreated my lvm on the second partition of the first sata drives, and the entire second sata.

lvm is complaining about the second sata disk (the one for wich the partitionning hasn't changed)

Thanks,

FX

[Windfall]

When you say "I delete the lvm" you mean that you delete the physical volume, right? Then you can do as I suggested, create a pv with the right uuid somewhere. Thing is, you probably need to recreate it at least as large as it used to be; see man 8 lvm under the option -P, which you should read anyway; so maybe it's best that you temporarily remove your new vg, then recreate the old state of affairs, then do things nicely using pvmove to restructure your old vg or vgremove to get rid of it altogether and start afresh. The -P option to lvm may be of some use to you; you should be able to access the working part of your old vg with it, and who knows, maybe even delete it (though probably not).

Hm, it just occured to me that maybe you can use dmsetup remove to get rid of the old vg; see man 8 dmsetup for more info. Should this work, it would be the easiest and cleanest solution, so give it a try. If you succeed, you'll probably want to remove the backup files for the old vg from /etc/lvm; I don't think lvm will do that.

On a side note, if you have a fast controller (like what they call UltraATA 133) for your ide disk, I don't think you'll experience much of a speedup by transfering your system files to the sata disks. Maybe you could use striped logical volumes using some space on each of the drives; then it might indeed be faster. (You probably don't want your /lib, /bin, /sbin and /root on an lvm volume, but you could certainly have /usr, /var, /tmp and /opt on a striped lv.)

Hope this helps (somewhat). If it doesn't, provide more detail; like how much space you have on the drives, how much data you need to keep on those disks (mention what's under / and what's under /home separately), whatever might be relevant, in detail. And do what you did by naming the exact commands; "removing the lvm" might mean a couple of things (like using pvremove, vgremove, fdisking the disk to remove the lvm's partition and so on). Well, anyway, I hope the above works and you can just post the success story.
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Michal Marczyk